Clamp for attaching springs to corrugated cross-bars.



W. H. BATES.

CLAMP FOR ATTAGHING SPRINGS T0 CORRUGATED CROSS BARS. APPLIO4TION FILED APR.18, 190s. RENEWED MAR. 15, 1909.

926,381 Patented June 29, 1909- UNTTED STATES PATENT OFFICE,

WILLIAM H. BATES, OF DETROIT, MICHIGAN. if i cLAMP FORATTACHING srnmes 'ro CORRUGATED cnoss-ils lnsi v r Specification of Letters Patent.

Application filed April 18, 1906, Serial No. 312,298. Renewed March 16, 1909.- serial no. 483,584? t T 0 all whom it may concern:

Be it known that I, WlLLL-m l BATES, a citizen of the United States, residing at Detroit, in the county of 'Wayne, State of Michigan, have invented certain new and useful Improvements in (lamps for Attaching a Spring to a Corrugated ross-Bar; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled ill the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

This invention relates to a clamp for attaching aspring to a corrugated cross bar, es ecially designed for use in connection Wlth the manufacture of upholstered seats and similar articles, and consists in the construction and arrangement of arts hereinafter fully set forth and claimec The object of the invention is to provide sim le and eflicient means for attaching the cus ion springs to the cross bar of a seat frame in a manner to enable said springs to be cuickly and firmly secured in place and rea ily adjusted to any desired location on the supporting bar, the arrangement being such as to provide for automatically locking the springs in position, and for allowing of the ready removal of the springs when desired.

The above object is attained by the structure illustrated in the accompanying draw ing, in which 2- Figure 1 is a fragmentary plan vlew of a portion of a seat frame, showing a corrugated cross bar thereof, and two springs secured thereto by my improved clamping means. Fi 2 is a side elevation of Fig. 1. Fig. 3 is a fragmentary view in perspective, showing the clamp formed integral with the lower end of the spring. Fig. 4 is a frag- -mentary viewin horizontal section, as on line 44 of Fig. 2.

Referring to the characters of reference, 1 designates one of the corrugated bars, of

' which there may be employed any number desired, and which cross between the rails 2 of the seat frame, the ends of said bars being secured to said rails in any suitable manner. The bars are formed ofstri s of iron, of suitable gage, and are mounted edgewise so as to present said corrugations laterally.

The springs 3are of the usual spiral forma- Patented Jim'e 29,'1909.;'

tion, and formed integralv with the lower coil 4 thereof is a rectangular clamp which stands nearly at right-angles to said coil in line with the axis of the spring, and consists of the opposed vertical sides 5 and 6, the bottom horizontal portion or cross piece 7 connecting said sides at their lower ends, and the upper horirontal cross piece 8 forming in effect a rectangular frame, there being a downwardly extending tongue Qfrom the upper cross piece 8 which depends Within said frame in t the plane of the sides-5 and 6. In placing the spring upon the corrugated bar, the tongue 9 is sprung laterally sufiiciently' to allow the bar 2 to pass between it and the sides 5 and 6 of the rectangular clamp. The clamp is then forced downwardly over the bar with the tongue 9 lyingin a depression of the corrugation on one side thereof, and the sides 5 and 6 lying in depressions on the opposite side of said ar. The depth of the rectangular frame of the clamp is such as to cause the lower cross piece -7 thereof to engage under the lower edge of the corrugated bar when the clamp is forced into osition thereon, thereby firmly locking the 0 amp to the bar and preventing its withdrawal until it is sprung sufliciently to carry the lower cross piece 7 from under the lower edge of the bar 1 when said clam may be removed by drawing upwardly on t e spring.

The clamp being formed integral with the spring; its parts are sufficiently resilient to cause the lower cross piece 7 to spring into engagement under the edge of the corrugation of the bar in the hollow of which the tongue 9 lies when the clamp is forced into lace, serving as an automatic lock for securmg the clamp in position.

By forming the clamp integral with the lower coil of the spring, no additional parts are required to secure the spring upon the bar, enablin the, spring to be quickly mounted. The spaces between the corruga tions of the bar are equal to the distance between the sides 5 and 6 of the clamp, thereby enabling the spring to be secured to the bar at any desired point thereon and moved from place to place along the bar at will. Because of the corrugations in the supporting bar, the clamp cannot slide thereon, but instead is firmly held against movement along the bar when it is once )laced in position.

Having thus fully set forth my invention,

what I claim as new and desire to secure by Letters Patent is 1. In a devlce for the purpose set forth, the

' combination with a cross bar having a lateral bend, of a spring and a clamp formed upon the s ring and engaging the opposite sides of said ar with tension to clamp the spring thereto, a part of said clamp engaging under the lateral bend of the cross bar.

2. a device for the purposeset forth, the combination of a corrugated cross bar posi tioned to dispose the width of the bar vertically, a s ring anda clasp formed upon the base of t e spring shaped to engage in the corrugations on op osite sides of said bar to clamp thespring t ereto and to engage the under edge of one of said corrugations.

I a clamp formed thereon, said clamp consisting of members which embrace the oppositevertical sides of the bar and lie in corrugations thereof, and having a cross iece which engages under .the lower edge 0 one of the corrugations of. said bar. a

l. Ina device for the purpose set forth, the combination with a supporting bar, of a spiral spring having a clamp formed integral with the base thereof, said clamp consisting of Vertically disposed spring members to engage the opposite sides of saidbar, anda horizontal cross piece to engage a portion of the lower edge thereof. 1

5. In a device for the purpose set forth, the combination of a cross bar, having corrugations therein,'a spiral spring, a clamp-formed integral with the base of said spring, said clamp consisting of a rectangular frame having vertical sides which engage in the depressions of the corrugations on one side of the bar, a spring tongue which engages in a depression on the opposite side of the bar and a cross piece which engages the lower edge of the corrugation in the hollow of which the spring tongue lies.

In testimony whereof, I sign this specification in the presence of two witnesses.

WILLIAM H. BATES.

Witnesses:

E. S. WHEELER, I. G. HowLET'r. 

